This recording
rain gauge utilizes a tipping bucket-type rainfall detector and a
mechanical pen recorder suitable for long-term (3
months) operation at sites without line electricity supplies,
such as in mountain regions. Every 3 months it is necessary to
change the roll chart and the dry cell battery for the chart feed
crystal clock.

The rainfall
receiver has a 200mm diameter and bucket capacity 0.5mm or 1mm.
It is accurate to within 3% for intensities of less than 100mm/h.

3. Input

Actual rain.

4. Output

Recorded
chart.

5. Operational
requirements and restrictions

For the
installation site of the instrument, a location should
be selected where there are no surrounding obstacles such as
large trees, buildings, and ground surface is flat.